Any suggestions on a CHEAP moving truck rental??

I am planning a move from Fl to NC and the cheapest moving truck I can find is 700. I've looked at Ryder, Uhaul, Budget, and Penske. I need a truck that says it holds at least 3 rooms. 16' seems to be the average size for that much room needed. If you know of a rental company that I haven't tried, PLEASE let me know. Thank You. I am moving from the Tampa Bay area to the HIckory area.